Fix: Trying to get devcontainer to build on first open of Codespace.

[BA-CalderonMorales]

Purpose

This pull request updates the devcontainer setup to optimize installation of large machine learning packages by moving their installation to a post-create script. This change helps reduce disk usage during the container build process and keeps the requirements files cleaner.

Devcontainer configuration improvements:

• Added a postCreateCommand in .devcontainer/devcontainer.json to run .devcontainer/scripts/postCreate.sh after the container is created, ensuring ML packages are installed only when needed.

• Created .devcontainer/scripts/postCreate.sh to install large ML packages (torch, sentence-transformers, pymupdf4llm, and lunr) after container creation, using CPU-only torch for smaller size.

• Removed direct installation of large ML packages from requirements-rag.txt and added a note explaining their installation is now handled by the post-create script

• Added a missing rich dependency to requirements.txt for the video tutorial here: Python + AI: Structured outputs
  

Does this introduce a breaking change?

[ ] Yes
[x] No (since the devcontainer started up in recovery mode, I'm hoping this at least gets people to open up the codespace with no issues.)

Pull Request Type

What kind of change does this Pull Request introduce?

[x] Bugfix
[ ] Feature
[ ] Code style update (formatting, local variables)
[ ] Refactoring (no functional changes, no api changes)
[ ] Documentation content changes
[ ] Other... Please describe:

How to Test

• Get the code

git clone https://github.com/BA-CalderonMorales/python-openai-demos.git
cd python-openai-demos
git checkout fix/devcontainer-disk-space-optimization
ctrl + shift + p
"Codespaces: Rebuild Container"
Full Rebuild
Container should not be in recovery mode.

• Test the code
  For testing, I ran the suite of python scripts from the demo. Those from the Python + AI: Structured Output video worked for me.

What to Check

Here is the output from running each of the files:

Click to Collapse

Other Information

Feel free to reach out if you have questions. I asked Claude Sonnet 4.5 to help me be surgical with the edits to make sure there are minimal changes to make this just work for others.

Hope this helps!